* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Microsoft YaHei', sans-serif;
}

body {
    background: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    min-height: 100vh;
}

header {
    background: #2c3e50;
    color: white;
    padding: 30px 20px;
    text-align: center;
}

nav {
    background: #34495e;
    padding: 0 20px;
    display: flex;
    gap: 0;
}

nav a {
    color: white;
    text-decoration: none;
    padding: 15px 25px;
    display: block;
}

nav a:hover {
    background: #3498db;
}

main {
    padding: 40px 20px;
}

footer {
    background: #ecf0f1;
    padding: 20px;
    text-align: center;
    margin-top: 40px;
}